Kaichao You (@KaichaoYou) — Twitter Score 11 out of 1000

Kaichao You is an AI and machine learning systems researcher who co-founded Inferact and serves as its Chief Scientist, while also acting as a lead maintainer of vLLM. Kaichao You's Twitter Score is 11 out of 1000 as of September 2026, ranking #87,339 among 487,142 tracked accounts.

Kaichao You holds a Ph. D. from Tsinghua University and has focused his work on open-source AI inference infrastructure. He is among the lead maintainers of vLLM, a role that carries responsibility for the project's overall direction and strategy, according to vLLM's governance documentation. He began contributing to vLLM and subsequently co-founded Inferact, a startup built by creators and core maintainers of vLLM with the stated aim of advancing open-source inference and making AI inference cheaper and faster.

Kaichao You co-founded Inferact alongside other vLLM contributors. Per Inferact's own disclosure, the company raised $150 million at an $800 million valuation, with the seed round led by Andreessen Horowitz and Lightspeed, and additional backing from Sequoia, Altimeter, Redpoint, ZhenFund, The House Fund, Striker Venture Partners, Laude Ventures, Databricks Ventures, GC&H, and the UC Berkeley Chancellor's Fund. Andreessen Horowitz publicly identified Kaichao You as one of the vLLM maintainers leading the company when it announced the round on January 22, 2026. Kaichao You has been active on Twitter since 2017, with 295 posts to date, and has been mentioned by 6 accounts across 9 total mentions.

Who follows Kaichao You on X?

The accounts that follow Kaichao You include 54 founders, 15 angel investors, 12 influencers and 2 VCs. Among his notable followers are Zmanian, T11s, Maria, Robert Scoble, Yohei and Ryan Shea.